int              rxvt_scrollbar_mapping           __PROTO((rxvt_t *r, int map));
void             rxvt_Resize_scrollBar            __PROTO((rxvt_t *r));
int              rxvt_scrollbar_show              __PROTO((rxvt_t *r, int update));
void             rxvt_setup_scrollbar             __PROTO((rxvt_t *r, const char *scrollalign, const char *scrollstyle, const char *thickness));
